APA引文

Travis, P., & Harrison, L. (2013). Practice tests for IELTS. HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Travis, Peter, and L. Harrison. Practice Tests for IELTS. London: HarperCollins Publishers, 2013.

MLA引文

Travis, Peter, and L. Harrison. Practice Tests for IELTS. HarperCollins Publishers, 2013.

警告：這些引文格式不一定是100％准確.